DE102007012455A1 - Local water treatment system for rain water, in a shaft structure, has a hollow zone for an ion exchanger and/or an adsorbent material - Google Patents

Abstract

The local water treatment installation especially for rain water, in a shaft structure (3), has a base plate (1) and a cover plate (2) forming a hollow zone (11) to contain an ion exchanger and/or an adsorbent martial. The base plate has a fine filter stick (10) in a guide (14).

Description

The The invention relates to a device, in particular a shaft installation, for the decentralized treatment of water, in particular of rainwater, with a base plate and a cover plate having a cavity for Inclusion of an ion exchanger and / or an adsorbent material form a shaft for the decentralized treatment of water, especially rainwater, with an inlet and a drain.

devices for decentralized wastewater treatment have been around for some time known. The main advantage of such systems is that the water can be cleaned or treated on the spot, consuming Sewer systems become superfluous. The treated water can then be passed to a consumer forwarded or fed to a percolation device become. Decentralized systems can be found in this context in the removal of particulate impurities, such as sand or organic turbidity, use. Out environmental view, however, also plays particularly the distance of heavy metals, oils and polyaromatic compounds a major role to meet the requirements of the federal soil protection and Contaminated Sites Ordinance (BbodSchV). Therefor In particular, ion exchangers are used, since such impurities can not be removed by filter cartridges alone.

For example, describes the DE 102 31 241 A1 a filter element for contaminated with solid particles and dissolved pollutants water and equipped with such a filter element cleaning system. The filter element is made of porous concrete, which is arranged in the water flow of the cleaning system. In order to exploit the entire height of the filter element, it is further proposed to make the porosity of the molding in the flow direction steadily or gradually increasingly finely porous. The disadvantage of the system is that the filter element is added over time by the filtered solids and therefore must be rinsed free or partially replaced at regular intervals in a countercurrent process.

By the DE 10 2004 042 390 A1 Another device for a shaft for decentralized treatment of water is proposed. The device consists of two spaced, void-forming plates, the void for introducing an ion exchanger for reducing heavy metal ions in the water. The advantage of the invention is that the plates consist of several segments, whereby the device can also be subsequently integrated into existing pits. For cleaning, the device is flushed countercurrently to remove deposits. Alternatively, only the entire replacement of the ion exchanger, for example by suction, possible.

It is therefore an object of the present invention, an apparatus and suggest a shaft, which is a reliable treatment of waste water, especially from roof and road drains, also allow for longer periods of time without the need for elaborate cleaning procedures.

These Task is solved by the characteristics of the independent Claims.

According to the invention proposed that the base plate is associated with a fine filter. This is mainly used for the filtration of organic microparticles, which in conventional systems for the formation of a Biofilms on the surface of the ion exchanger and / or of the adsorbent material within the cavity between the base plate and cover plate are responsible. Such a film influences however in not neglecting the way the effect said filling material, so that a cleaning of the same would be necessary at regular intervals. Likewise, it can also be due to such a biofilm to complete Clogging of the pores of the base and cover plate come. By the Pre-connection of a fine filter can such organic Particulate matter that is found mainly in rainwater, especially roof or road drains, in a simple way be withheld. The activity of the ion exchanger and / or the adsorbent material within the cavity can thus over be maintained for a much longer period.

advantageously, the maximum mesh size of the fine filter is less than 0.75 mm. This will ensure that the majority the organic microparticles that are in the wastewater are retained by the fine filter.

If the base plate and / or the cover plate are open-pored, it is ensured that the material introduced into the cavity is uniformly flowed through by the water to be treated. A pore diameter of about 1 mm has been found to be particularly advantageous. The pore diameter should in any case be greater than the mesh size of the fine filter, so that no substances that can pass through the fine filter, settle in the pores of the base or cover plate. The fine filter is assigned to the base plate in such a way that the water, after passing through the fine filter in the Distributed area of the base plate and then flows in the direction of the cover plate through the ion exchanger and / or the adsorbent material. Of course, the fine filter with respect to the base plate is to be arranged so that the water to be treated must pass through the fine filter before it can flow into the base plate and finally into the cavity. Depending on the pollutants to be removed, various substances, for example concrete (concrete filter) with a high CaCO ₃ content in the cement, can be used as the adsorbent material. After passing through the ion exchanger and / or the adsorbent material, the water flows through the open-pored cover plate and can eventually be forwarded to a consumer or infiltration device as needed.

Advantageous is also, if the base plate an opening to at least having partial absorption of the fine filter. this makes possible on the one hand a mounting or storage of the fine filter on the Baseplate. On the other hand, by choosing the location and size the opening the flow direction and speed of the water between the fine filter and the base plate.

In a particularly advantageous embodiment of the base plate assigned a liquid-tight layer. This is appropriate to the cavity away from the side of the base plate arranged. By such a layer, of course, the area leaving the opening open will ensure that the water to be treated only through the opening the base plate and thus the fine filter in the cavity can flow. The opening of the base plate the surrounding area, on the other hand, is sealed by the watertight layer, to an undesirable penetration of particular organic To prevent microparticles in the cavity.

Especially it is advantageous here if the fine filter as a filter candle is formed, at least partially in the opening the base plate can be inserted. Unlike one Fine filter in the form of a filter plate, which precedes the base plate is, can over the length of the filter cartridge, the filter surface being enlarged, of course, too the use of a filter layer in the form of a plate or a other form is not excluded. The filter cartridge can from a carrier cylinder, for example from a perforated plate, and an overlying filter layer. The expert are suitable filter materials, such as nonwovens or corresponding mesh fabrics, known.

is the fine filter movably mounted, so this can for cleaning purposes or to replace the filter layer easily from the device moved and then removed if necessary. is the filter, for example, designed as a filter candle, so offers It is, the filter cartridge through the opening of the base plate and a corresponding, closable opening the cover plate, to pull out.

in this connection it brings advantages if the fine filter is a guide element assigned. This advantageously extends from the Base plate in the direction of the cover plate and optionally through this therethrough. If the fine filter is designed as a filter candle, so recommends a guide in the form of a cylindrical shell, in which the filter cartridge moves in the direction of its longitudinal axis can be. The jacket expediently extends from the Area of the opening of the base plate in the direction of the cover plate, possibly also through them.

Advantageous is also when at least one end of the filter candle to the end rejuvenated. Is the filter cartridge along the guide element moved or introduced into this, so this can be caught the filter cartridge with the guide or the opening the base plate can be effectively avoided.

In a particularly advantageous embodiment of the invention is the Fine filter associated with a stripper. By such Device can easily adjust the surface of the fine filter be removed from adhering contaminants, so that the Significantly prolonging the service life of the same. The scraper can be either with respect to the Fine filter be movably mounted. An alternative possibility exists in order to arrange the stripper fixed and a relative Movement between scraper and fine filter surface to ensure by the movement of the fine filter.

is the scraper arranged on the base plate, so is a particularly advantageous arrangement of the stripping proposed. In particular, when the scraper in the region of the opening the base plate is, in which the filter candle protrudes, can by a movement of the filter candle within the guide element an efficient cleaning of the filter surface done. Lies the stripper close to the filter cartridge while this is moved in the direction of the cover plate, so become adherent Impurities effectively withheld. While usually a single stiffening for a satisfactory Cleaning the filter candle should be sufficient, the Cleaning effect by repeated reciprocating the filter candle be further improved along the stripping.

Advantageous is also when the filter cartridge associated with a gripping element is. This protrudes from the filter candle through the cavity and finally through the cover plate through, with a corresponding seal the Gripping device must be present to prevent water can pass unfiltered into the cavity. By the gripping device In a simple way, a cleaning of the filter cartridge is also built-in Condition of the device allows. In general, the Device integrated in a corresponding bay. such Manholes usually consist of a substantially cylindrical Outside wall and have a manhole. Through this manhole Finally, the gripping device can be taken to the Fine filter along the stripper in the direction of the manhole to draw.

For the case of heavy rains or otherwise strong Water flow, it is advantageous if the device is an emergency overflow assigned. This can ensure that the water even with appropriate amounts of water, but then without treatment, can flow through the device. The emergency overflow can be integrated in the device in the form of a bypass. This also serves to drain the water in the event of a blockage the flow path according to the invention.

Especially It is advantageous if the base plate and / or the cover plate consist of several segments. This makes it possible in a simple manner, the base and cover plate and thus also the entire device to integrate later into an existing sewer manhole. The segments can, for example, through a manhole introduced into the shaft and then inside of the shaft are joined together.

One inventive shaft is characterized from that he has a device according to the preceding Description has. The dimensioning of the individual components, such as shape and size of the basic and Cover plate, choice of fine filter or extent of the cavity can be adapted to the respective types of huts, so that use of the device according to the invention in most of the existing sewer manholes is conceivable.

advantageously, the base plate and the cover plate are laterally in the shaft sealed arranged. This creates a cavity for receiving an ion exchanger and / or an adsorbent material, which is bounded by the shaft wall and the base and cover plate. Thus, the water to be treated only over the Fine filter, which is associated with the base plate, in the cavity flow. The sealing of the device in the shaft For example, by silicone, which between the device and the shaft is arranged. By an appropriate design the device adapts almost completely to the inner shaft diameter so that the silicone only bridge a narrow gap got to. The seal can alternatively also by means of sealing rings, which be inserted between the device and the shaft interior, respectively.

Around to ensure a particularly good cleaning of the water and the ion exchanger or the adsorbent material optimally to be able to use, it is provided that the device in the shaft is installed in such a way that they are in the upflow is flowed through. As a result, the water from the bottom to passed through the top of the inventive device. Coarser impurities retained by the fine filter, which do not adhere to the filter surface fall or sink down and then out the device are removed.

Also it is advantageous if under the device a separation unit arranged for retained by the fine filter substances is. This unit can be formed, for example, by a collecting space be, who is below the invention Device is located. Due to gravity decrease entrained Particles retained by the fine filter partly in this collection room to the ground and can in certain Time intervals are removed.

is the separation unit is a hydrocyclone, so is a particularly effective Device proposed for separating impurities. The water is entering via a tangential Feed into the cyclone, in which heavier particles caused by the occurring centrifugal forces in the wall area accumulate. Since the water flow is lower here, sink They finally go down and can in one Collecting container to be collected below the Cyclone is located. The water separated from the particles flows finally through the fine filter, which is essentially located in the middle above the cyclone, in the space between Base and cover plate.

Advantageously, a suction device is arranged within the shaft and below the device, for example within the collecting space. The suction device is used in the case of regeneration of the ion exchange exchanger with a regeneration liquid for sucking off this regeneration liquid. This prevents the regeneration liquid from entering the purified water and thus the groundwater. In addition, the suction device can also be used for disposal the substances retained by the fine filter which settle in the collecting space are used.

Around The purified water into the ground or in the groundwater to be able to initiate, a drain is arranged on the shaft. This can of course also with a consumer in contact with the treated water becomes.

Around an introduction of oily substances in the groundwater To avoid, the sequence is advantageously an oil separator assigned, which cleaned at certain intervals or is emptied.

in the Following, the invention will be explained with reference to figures. Show it:

1 . 2 a device according to the invention within a shaft.

1 shows a device according to the invention. This has a base plate 1 and a cover plate 2 on, the side sealed in a shaft 3 are arranged. The attachment of the plates can be done via ring segments 4 done, the part of the shaft 3 are. Likewise, spacers, not shown between the two plates can be arranged, so that the cover plate 2 indirectly over the base plate 1 in the shaft 3 is attached.

The shaft 3 also has an inlet 5 through, through which the water to be treated in the shaft 3 is directed.

The shaft 3 also indicates in the area of the inlet 5 a dent 6 on whose surface has the shape of a funnel. The feed 5 is in the case advantageously arranged such that the water substantially tangentially with respect to the shaft longitudinal axis in the shaft 3 is initiated. Due to the tangential orientation of the inlet 5 arises in the area of the indentations 6 a kind of vortex flow, which entrained particles 7 be pressed by the action of centrifugal forces in the direction of the indentation surface. Since the flow velocity is lower here than in the middle of the indentation 6 formed funnel, the particles sink 7 down to a collection room 8th , which is to suck off the particles 7 a suction opening 9 to which a suction device, such as a centrifugal pump, can be connected.

The water to be treated finally flows through a fine filter in the form of a filter candle 10 , After passing the filter candle 10 the water eventually flows over the open-pored base plate 1 in the cavity 11 that by ground plate 1 and cover plate 2 is formed.

The base plate 1 has a waterproof layer 12 on, which prevents water from the bottom through the base plate 1 is pressed without passing through the fine filter. In the cavity 11 Depending on the use of the device a variety of substances, such as ion exchangers 13 (please refer 2 ) and / or adsorbent materials, which serve the treatment of the water, for example the removal of heavy metal ions. The effectiveness of these materials is directly dependent on the cleanliness of their surface. In order to prevent the formation of a biofilm due to organic microparticles, fine filters are used with extremely small mesh size of less than 1 mm, particularly advantageous below 0.75 mm.

The filter candle 10 is in turn movable in a guide element 14 stored, which is in the form of a cylinder from the base plate 1 over an opening of the cover plate 2 to the top of the shaft 3 extends.

At the filter candle 10 itself is a gripping element 15 Arranged over a manhole 16 of the shaft 3 is reachable. About this gripping element 15 is it possible now, the filter candle 10 within the guide element 14 to pull up. This will be impurities 17 , in particular organic microparticles, which adhere to the surface of the filter candle 10 accumulated by a scraper 18 stripped off the surface and can finally get into the plenum 8th fall.

The stripping device is either directly on the base plate 1 or on a supporting structure 19 that the stiffening of the base plate 1 serves, attached. Such stiffening may be necessary if the base plate 1 itself has too low Eigentragfähigkeit and may for example consist of a grid-like frame construction. Is the supporting structure 19 even waterproof, can of course also on the waterproof layer 12 below the base plate 1 be waived.

The base plate 1 , the supporting structure 19 and the cover plate 2 can be made up of individual segments 20 be assembled to retrofit the device into an existing shaft 3 to enable. Such segments 20 are in 1 in the case of the cover plate 2 indicated.

After the water the ion exchanger 13 and / or has passed through the adsorbent material, it flows through the cover plate 2 and finally gets over a process 21 forwarded to a corresponding consumer.

If the water is oily ingredients leads, it may be appropriate in the area of the expiration 21 to arrange an oil separator. In the example shown here this is through an angled pipe 22 formed, the end of which is below the water surface. Thus, it is easily prevented that oily substances that always float on the water surface, the shaft 3 about the process 21 being able to leave.

About the suction opening 9 on the one hand the particles 7 or other impurities 17 , which are retained by the fine filter, are sucked off. Likewise, this opening can serve for the suction of regeneration liquid, the shaft 3 for the regeneration of the ion exchanger 13 can be added and the device flows through from top to bottom.

Since the volume flow of the water through the device according to the invention through the fine filter and the ion exchanger 13 and / or the adsorbent material between base plate 1 and cover plate 2 is limited, the device is advantageously an emergency overflow, for example in the form of a bypass 23 , assigned. The upper opening of the bypass 23 is expediently above the process 21 arranged. This ensures that the water in normal operation the fine filter 10 and the ion exchanger 13 and / or the adsorbent material passes. However, if this way is clogged, the water rises due to the water pressure in the bypass 23 up and can the shaft 3 finally about the process 21 leave, in this case, however, untreated.

2 also shows the device described above. The filter candle 10 is however in its upper position. As can be seen, impurities become 17 , which have accumulated on the filter surface, when pulling up the filter cartridge 10 with the help of the gripping element 15 reliably retained by the scraper and sink down towards collecting space 8th from. Here you can finally over the lower suction 9 be removed by means not shown suction.

Moreover, in 2 the cavity 11 between base plate 1 and cover plate 2 with an ion exchanger 13 filled, which serves the actual treatment of the water.

The filter candle 10 also tapers towards its lower end, to catch when pushing back the filter cartridge 10 through the opening of the base plate 1 to prevent.

Deviating from 1 is in 2 as an emergency overflow a bypass pipe 24 provided, extending from the inlet 9 before entering the collection room 8th branches off and above the drain 21 in the shaft 3 empties. Again, the water rises in a blockage of the flow path according to the invention, due to the hydrostatic pressure, within the bypass pipe 24 upwards, with the upper opening of the bypass pipe 24 therefore expediently above the drain 21 should be arranged. This ensures that the water in normal operation the fine filter 10 and the ion exchanger 13 and / or the adsorbent material passes. Of course, the bypass pipe 24 also directly into the process 21 lead. In an arrangement according to FIG. 2, however, it is easy to pass through the manhole 16 be tracked which way the water takes.

The The present invention has been described with reference to exemplary embodiments explained in more detail. Modifications of the invention are within the scope of the claims readily possible, where expressly all in the description and the features described in the description of the figures any combination can be realized with each other, as far as seems appropriate and possible.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10231241 A1 [0003]
• DE 102004042390 A1 [0004]

Claims (21)

Device, in particular shaft installation, for the decentralized treatment of water, in particular of rainwater, with a base plate ( 1 ) and a cover plate ( 2 ), which has a cavity ( 11 ) for receiving an ion exchanger ( 13 ) and / or an adsorbent material, characterized in that the base plate ( 1 ) is associated with a fine filter. Device according to claim 1, characterized in that that the maximum mesh size of the fine filter is less than 0.75 mm. Device according to one or more of the preceding claims, characterized in that the base plate ( 1 ) and / or the cover plate ( 2 ) are formed porous. Device according to one or more of the preceding claims, characterized in that the base plate ( 1 ) has an opening for at least partially receiving the fine filter. Device according to one or more of the preceding claims, characterized in that the base plate ( 1 ) a liquid-tight layer ( 12 ) assigned. Device according to one or more of the preceding claims, characterized in that the fine filter as a filter cartridge ( 10 ) is trained. Device according to one or more of the preceding Claims, characterized in that the fine filter is movably mounted. Device according to one or more of the preceding claims, characterized in that the fine filter is a guide element ( 14 ) assigned. Device according to one or more of the preceding claims, characterized in that at least one end of the filter cartridge ( 10 ) tapers towards the end. Device according to one or more of the preceding claims, characterized in that the fine filter is a stripping device ( 18 ) assigned. Device according to one or more of the preceding claims, characterized in that the stripping device ( 18 ) on the base plate ( 1 ), in particular in the area of the opening of the base plate ( 1 ) is arranged. Device according to one or more of the preceding claims, characterized in that the filter cartridge ( 10 ) a gripping element ( 15 ) assigned. Device according to one or more of the preceding Claims, characterized in that the device an emergency overflow is assigned. Device according to one or more of the preceding claims, characterized in that the base plate ( 1 ) and / or the cover plate ( 2 ) of several segments ( 20 ) consist. Shaft for the decentralized treatment of water, in particular rainwater, with an inlet ( 5 ) and a procedure ( 21 ), characterized in that it comprises a device according to one or more of the preceding claims. Shaft according to the preceding claim, characterized in that the base plate ( 1 ) and the cover plate ( 2 ) in the shaft ( 3 ) are arranged laterally sealed. Shaft according to one or more of the preceding claims, characterized in that the device between the inlet ( 5 ) and the process ( 21 ) is arranged to flow in upflow. Shaft after one or more of the preceding ones Claims, characterized in that under the device a separation unit for retained by the fine filter Fabrics is arranged. Shaft after one or more of the preceding ones Claims, characterized in that the separation unit is a hydrocyclone. Shaft according to one or more of the preceding claims, characterized in that below the device a suction device ( 9 ) is arranged for retained by the fine filter materials and / or regeneration liquid. Shaft according to one or more of the preceding claims, characterized in that the sequence ( 21 ) is associated with an oil separation device.